Water-cooled piston for gas-engines.



I G. B. PBTSGHE. WATER COOLED PISTON FOB. GAS ENGINES.

nruonmn IILBD JAN. 10. 1905.

967,551} r Patented Aug. 16,1910.

2 Barbra-sum 1.

[NI/EN ran WIT 53358:

M I I BY l TTURNE G. B. PBTSGHB. WATER 000L111) PISTON FUR GAB BEGIN ES.

2 EHIBETFBEBBT I.

- Patented Aug.16,1910.

LPPLIOATIOI FILED III.

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"mun.

- ing in the city and county of Philadelphia,-

UNITED s'r frEs PATENT OFFICE.

cns'rAv 2B. rn'rscnn, or PHILADELPHIA, PENNSYLVANIA; AssIeNon TO SOUTHWARK FOUNDBY'& MACHINE GOMBANY, or PHILADELPHIA, PENNSYLVANIA, A com PoBArIoN or rnNNsYnv'ANIA-L WA'IEECOOLED rIsr-oN ron GAS-ENGINES.

' Application filed January 10, 1905. Serial N'q. 240,521.

specification of Letters latent- Patented Aug. 16, 1910.--

To all it may 'Be it known that I, GUs'rAv B. Parsons, a subject of the Emperor of Germany, residin the Stateof Pennsylvania, have invented 'a certain new and useful Improvement in Water-Cooled Pistons for'Gas-Engines, of which the following is a true and exact description, reference being had to the accompanying. drawings, which form a part thereof.

My invention relates to gas engines and particularly -to the piston construction used in connection with gas engines, my object being to provide a piston made up of a piston center and a bull ring, both parts of which can be and are kept cool by circulating water through them.

The nature and preferred construction of my piston will be best understood as described in connection with the drawings in which it is illustrated and in which Figure 1, is a side elevation of a gas engine coupled to a blowing engine and utilizing my improved piston, .the said figure indicating how Water can be sup lied to and withdrawn fromthe piston. Fig. 2, is a central vertical section through one of the gas engine cylinders and through the distance piece separating the two cylinders shown in Fig. 1,-the piston and circulating ports being partly shown in section. Fig. 3,'is an enlarged-view of the piston, taken on the same section'as shown in Fig. 2 with the piston rod shown in full lines. Fig, 4,. is a cross-section on the line 4.-A of ig.

18, the engine 'frame,;C, the blowing engine:

connected therewith, D, and D the s engine cylinders set tandem, E,th'e distance piece between the cylinders having, as

shown, a removable top, part E and removable end piece E, which construction forms the subject matter of my other application for Letters Patent filed 30th Decemb'er,190-fl, Serial Number 238,919. d

F, is a sliding crosshead to which the end of the-pistonrod H, is secured; F, a slid ing crossheadjmoving in the distance piece- 11, and to which the ends of the piston rods and H, are secured, the other end of the'piston rod being supported on the sliding erosshead F G, and G, indicate istons of the two cylinders, and H, and the piston rods connected with the twopistons and connected together through the sliding crosshead, as indicated in Fig. 2.

I, is the piston center and J, the bull ring of the piston.

The piston rods, see Fig. 2, are formed With centrallongitudinal water passages K and K, which open through the side of the piston rod at the point where the piston is secured to it through ports K, and K the passages K, and K being entirely separate from each other.

At L, I have shown a jointed water conduit connected to the passage K, of the rod H, through a lateral port K while the outer end of the rod H, is connected to a jointed water. conduit '0. The water passages in the piston rods areclosed at the ends which are secured to the crosshead F, as by lugs K", K", .see Fig. 2, and the passages oi the two abutted rods are connected together through a pipe N, coupled bylateral ports K K as shown.

lhe piston center I is formed with thean- 'nular mlet passage or chamber 1, which (Fig. 3) is 1n communication with ports K of ,t e rod H. A series of ports I lead from Y the chamber I at one side of the piston rod isee Fig. 4;) into axial chambers or passages 3 fomed in the piston center. The chambers I communicate adjacent the righthand end of the piston center, as seen in the drawings, with an annular passage or chamber I.

piston center has formed in it a series of axial passages orchambers I WhlCll communicate at one end with the passageP and at the other end with a semi-annular passage 1. A series of ports I lead from the semiannular passage I to the left hand end of the piston center. The piston center is also provided with an annular outlet chamber 1 in communication with the outlet ports K Ports I connect the annular massage I .with a semi-annular passage I located on .0 11 the opposite side of the piston rod the The cylindrical portion of the bull ring surrounds the piston center with the flange the opposite side of the piston rod from the passage I. Ports I lead from the passage I to the adjacent end of the piston center.

The outer piston port-ion or bull ring J, comprises a cylindrical portion J having an inwardly extending flange J 2 at one end.

bearing against the end of the piston center as shown in Figs. 2 and 3. The hull ring is formed at one side of the piston rod with a set of axial passages J 5 which are connected adjacent one end of the bull ring by a semiannular passage J 4 from which lead ports J 3 communicating with the ports I of the piston center. At the opposite end of the bull ring the passages J, are connected by an annular passage or chamber J v On the opposite side of the piston rod from the passages J the bull ring has formed in it a set of axial passages J 7 which communicate with the passage orchamber J The passages J 7 are also connected by a semi-annular passage J 3 diametrically opposed to the. passage J Ports J leading from the ister with the ports I.

- It will be seen that the water entering, for instance through the conduit L and'the rod passage J regpassage K, will pass through the ports K to the annular chamber I of the piston center. From there the water passes through the ports I to the passages I and from there through the annular passage I to the passages I and thence through the ports I. into the bull ring through the ports J In the bull ring the water passes from the semiannular passage J 4 through thepassages J 5 to the annular chamber J and thence through the passages J 7 to the semi-annular passage J 8 whence it passes through the ports J 9 into the ports I of the piston center. From the ports I the water passes through the passage I and ports I to the outlet chamber I of the piston center and thence through the ports K into the piston rod passage K From the piston rod passage K? the water passes through the pipe N to the ports K of the piston rod N and thence, through the similar piston of the other cylinder.

It will be observed that the circulatingwater passes to the outlet orts K from the ports and passages in the ull ring: through another set of ports and passages in the piston center.

While the'special arrangement of ports in the piston center and bull ring are well adapted for an eflicient circulation of water therethrough, it will be understood that I do not limit my invention to this particular system which is capable of extended variation.

Having now described my invention what I claim as new and desire to secure by Letters Patent is,

1. In combination with a hollow piston rod havinginlet and outlet passages, a piston center provided with inlet and outlet chambers adapted to communicate with the passages in said rod, and havin a circulating system of passages forme in it and communicating with said inlet and outlet chambers and a bull ring having an annular portion encircling said center and provided with circulating passages which have portions exte'ndin axially in said annular portion and whic when the ring is fitted to the center, connect with and form continuations of the circulating passages of the center.

2. In a gas engine, the combination with a plston rod having water circulating passages therein, of a piston made up in sections, one of which has an annularportion encircling the other section each of said sections having water circulating passages therein, the passages in one section being connected in series with those in the other and also with the passages of the piston rod, to constitute a water circulating system, the

passages in the section having said annular portion having portions extending axially in said annular portion.

3. A gas engine piston made of aninner part I and an outer part J, the inner part I being adapted to be secured to a hollow piston rod and bein formed on one side with a set of axial c ambers I and on the other side with a set of axial chambers I", said inner part also having formed in it an annular chamber I connecting the chambers I and I, an inlet chamber I connected to the chambers I by ports I and an outlet chamber I and passages I, I and I communicating therewith, and the outer art J being formed at one side with a set 0 axial chambers J 5 communicatin with the chambers I and at the other side with a set of axial chambers J 7 which communicate with the passages I, said outer part J also havmg the assage J connecting the passages J 5 and J t. A gas engine piston comprising a center portion and an outer portion, sald center ortion being formed with an inlet chamher and at one side with a series of axial passages communicating with the inlet chamber, and at the other side with another set of axial passages communicating adjacent one end of the center ortion with a set of ports, said center portion also having a passage adjacent the opposite end of the eavguu x i i 3 centei portion, connecting said two sets of her of. the center portion said outer piston 10 passages, and an outlet chamber and pasportion being also provi ed with a passage sages communicating therewith, said outer connecting said two sets of axial passages piston portion being provided atone side formed in it.

with axially extendmg assages communieating with said ports of the center portion AT T H and at the opposlte side with another set of Witnesses: axial passages communicating with the pas- ARNOLD Ka'rz, sages communicating with the outlet cham- D. STEWART. 

